Friction draft-gear for railway-cars.



1. F. oicoNNoR.

FRICTION DRAFT GEAR FOR RAILWAY CARS.

APPLICATIQN FILED OCT. 22 |912. 1,156,092.:

Patented Oct. 12, 1915.

INVENTOR f agwf.

ATTORNEY Z@ BY llll 1 WITNESSES I J. F. OCONNOR. FRICTION DRAFT GEAR FOR RAILWAY CARS.

APPLlcATIoN FILED ocr. 22. 1912.

Patented 001.. 12, 1915.

2 SHEETS-SHEET 2.

wlTNEssEs INVENTOR V. E. N R 0 T T. A

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. MINEFI, F

CHICAGO, ILLINOIS.

TFIEtItILIO'lNI' DRAFT-GEAR FOR RAILWAY-CARS.

Specification of Letters Patent.

' Patented 00u12, i915.

Application led October 22,1912. Serial N o. 727,164.

T o all /w/Lom t may concern:

Be it known that I, JOHN F. OCoNNoR, a citizen of the United States, .residing in Chicago, in the county of Cook and-State of Illinois, have invented a certain new and useful Improvement in Friction Draft- Gears for Railway-Cars, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification. p

My invention relates to improvements in friction draft gears for railway cars.

The object of my invention is to provide a compact friction draft gear of high shock absorbing capacity.

In the drawings Figure 1 is a side elevation partly in longitudinal section on linel 1 1 of Fig; 3 of a railway draft rigging embodying my invention. Fig. 2 is a onehalf cross section on line 2 2 of Fig. `1. Fig. 3 is a plan` view partly in horizontal section on line 3 3 `of Fig. 1. Fig. 4 is an enlarged detail View of the draft gear in cross section on line 4 4 of Fig. 5. Figs.-

5 and 6 are each-side elevations `of the draft gear partly in vertical longitudinal section along line 5 5 of Fig. 4; Fig. 5 showing the gear with its parts in normal position, and

Fig. v6 showing. the parts compressed. Fig.v

7 is a perspective view of one of the antifriction rollers. Fig. 8 is a perspective view of the wedge; Fig. 9 a perspective View of one of the friction shoes. Fig. 10 a perspective view of a supplemental follower. Fig. 11 a perspective view of one ofthe movable spring seats, and Fig.v 12 a vperspective view of one of the4 supplemental friction shoes.

Referring to the drawings 13, 13 represent draft sills or parts of the car frame to which the draft rigging is attached, 14, 14 stop members secured thereto and provided with front and rear stop shoulders 15, 15 and 16, 16 respectively. The stop members are each provided with the longitudinal groove 17to,receive the limbs 18, 18 of the longi-v tudinallyfdisposed draft yoke 19, which reciprocate` therein. The draft yoke is suitably secured to the draw-bar 20 by the drawbar key 21. The end sill 22, buffer block 23, striking plate 24 and draw-bar carry iron 25 are all 'of usual construction.

The draft gear or compression resisting member 2G is mounted within the draft yoke The shell or housing 28 is of a general recs tangular shape open at its forward end and closed at its rear end by the preferably integral plate 32.

In normal position or in bufling movement of the gear the rear outer faces of the shell engage the rear stop shoulders 16, 1G. The friction chamber 29'of the shell or housing is in general shape a hollow cylinder provided with the internal friction face 33 with which the friction shoes 34 engage. The friction shoes are preferably three in number, each provided with the outer friction face 35 and the inner wedge face 36, which is acted upon through the anti-friction roller 37 by the wedge 38. The wedge 38 preferably has three wedge faces 39, or one for each ofthe friction shoes, with an anti-friction roller 37 engaging between each wedge face and the adjacent friction shoe. The friction shoes arev annularly arranged, and each is provided with an inner shoulder 40 to form a seat for the supplemental follower 41. The supplemental follower 41, the wedge 38 and the rear plate 32 of the housing are suitably apertured longitudinally for the passage of the central connecting rod 42, the head 43 of which is received within the recess 44 in the forward face of the wedge, and the nut 45l of which is received in the recess 46 in the rear outer face of the shell.

The friction chamber o29 is provided at its rear end with upper and lower similar openings 48 leading to the upper and lower spring chambers 30 31. The said openings each permit the passage of a supplemental friction shoe 49. Vrrrl`he said supplemental shoes are preferably'two in number, and are each in preferred form of a general semi-lunar shape in longitudinal section. Each is provided with a friction face 50 conforming to the friction face 51 provided for each in the rear inner face of the shell or housing. The friction faces 51 each eX- `tend substantially from the center of the mental shoe 49 is provided at its inner end,

that is the end within the lfriction chamber, with a transverse rounded shoulder 53 which engages the rear face 54 of the supplemental follower 41. At its outer end, that is the end within th-e spring chamber, each supplemental friction shoe is provided with rounded transverse shoulders 55 corresponding in number' with the springs in each spring chamber.

The movable spring seat 52 is rearwardly provided with suitable recesses 56, one to receive each shoulder 55 of the supplemental friction shoe engaging therewith, and preferably said movable spring seat is provided on its forward face with bosses 57 around which the adjacent spring 58 is seated. |The springs 58 are suitably seated at their forward ends. lf prefer to seat them against the rear face 59 of the front follower 60, which valso engages the front face 6l of the wedge 38 and is vertically arranged within the draft yoke.

rlihe shell is' outwardly laterally provided with the upright webs 62 perforated longitudinally of the shell to receive the outer connecting rods 63, 63, which are preferably four in number,I two on either side of the shell. Said connecting rods pass Vthrough the front follower, and the nut 64 of each is received within a suitable recess 65 in the forward face of the follower. The head 66 of each rod is received within a recess 67 in the rear face of the shell.

lt will be apparent that upon movement of the draw bar stresses transmitted to the gear will be absorbed not only by the' friction shoes 34 but also'by the supplemental shoes 49, and through these shoes by the springs 58. lt will also be clear that the springs 58 will also be acted upon at their forward ends through their engagement with the front follower. rlhe transverse rounded shoulders at the ends of the supplemental shoes spermit the necessaryyoscillation of the same when the gear is in action.

ln normal position of the parts within the shell, as illustrated in Fig. 5 of the drawings, the springs 58 are forwardly extended beyond the openings of the spring chambers. Under full compression the parts will assume thepositions within the shell illustrated in Fig. 6.

1. A draft gear for railway cars comprising a shell provided with a central friction chamber and parallel adjacent spring chamricarica bers, friction compression resisting members with the friction chamber and springs within the spring chambers, and friction means for operatively connecting the friction compression resisting members with said springs.

2. A draft gear foi` railway cars comprising a shell provided with a central friction chamber and parallel adjacent spring chambers, friction compression resisting members within the friction chamber and springs Within the spring chambers, and means for operatively connecting the friction compression resisting members lwith said springs, said means comprising curved shoes engaging the friction compression resisting membeis at one end and the springs at the other en 3. ln a` railway draft rigging, a cushioning member comprising a shell having a central friction chamber and parallel adjacent spring chambers, a wedge and friction shoes within said friction chamber, and springs within the spring chambers, openings within said shell between the friction chambers and spring chambers, and shoes passing through said openings engaging the n friction compression resisting memb one end and the springs at the other end.

4. lin a draft rigging for railway cars, a cushioning member comprising a shell, a friction chamber and adjacent spring chambers in said shell, said spring chambers being arranged on opposite sides of said friction chambers, the said chambers being closed at their rear end, openings provided between each spring chamber and the friction chamber, friction compression resisting members within the friction chamber, springs within the spring chamber, the rear inner face of the shell being provided along the said openings with a friction face, friction shoes having friction faces each engaging one of said friction faces ofthe shell, and in engagement with the friction compression resisting members at one end and the springs at the other end.

5. n a draft rigging for railway cars, a cushioning member comprising a shell having a friction chamber and spring chambers adjacent and parallel thereto, friction compression resisting members within the friction chambers, and springs within the spring chambers, a shoe for each spring chamber engaging the springs therein at one end and engaging the friction members within the friction chamber at the other end.

6. lin a railway draft rigging` a cushioning member comprising a shell having a central friction chamber, and at the sides thereof spring chambers having openings leading to the friction chamber, friction elements within the friction Achambers and springs within the spring chambers, and

ers at iat' shoes connecting the springs with the friction elements, the said shoes having frictional bearing against the shell.

7. In a railway draft rigging, the combi- I nation of draft sills, stop members, draw bar and draft yoke, of a cushioning member and a front follower, the said cushioning member comprising a shell having a central friction chamber and friction elements Within said chamber, and spring chambers beside and parallel to the friction chamber, shoes connecting the said friction elements with the said springs, the said springs being seated at their forward ends against the front follower.

8. In a railway draft rigging, the combination of draft sills, stop members, draw bar and draft yoke, of a cushioning member and a front follower, the said cushioning member comprising a shell having a central friction chamber and friction elements within said chamber, and spring chambers beside and parallel to the friction chamber, shoes connecting the said friction elements with the said springs, the said springs being seated at their forward ends against the front follower, and connecting rods connecting the said shell with the front-follower.

9. In a railway draft rigging, the combination with the draw bar, draft yoke, draft sills, stop members, of a shell'and front tween the friction members and the springs'is chambers, one on either side of the said frict1on chambers, friction shoes and wedge withv in the friction chamber, and apair of springs in twin arrangement in each of the spring chambers, a movable s ring seat for each set of springs, and a supp emental friction shoe for each spring chamber adapted to engage the said spring seat at its o-ne end and to operatively engage the members Within the friction chamber at its other end.

13. In a railway draft rigging, a cushioning member comprising ashell having a friction chamber and springchambers arranged along the .side thereo friction elements within the friction chambers and springs in .I

each of the spring chambers, and supplemental friction shoes in frictional engagement with the shell adapted to engage a spring at one end and the friction members at the other end. y

14. In a railway draft rigging, 'a cushioning -member comprising a shell having a friction chamber and adjacent spring chambers, an openin from each sprmg chamber to ,the friction c amber, a supplemental fric tion shoe extended through each4 of 4said Vopenings, each ofsaid supplemental friction shoes operatively connecting the friction elements in the friction chamber with? the springs in one of the spring chambers.

15. In a railway draft rigging, a cushioning member comprising a shell having a cen tral friction chamber and parallel adjacent spring chambers, a wedge and frictionshoes within the spring chamber, and a supple- 4mental follower in engagement .with said l0. In a railway draft rigging, a cushioning member comprising a shell, a friction chamber and spring chambers alongside the friction chamber in said shell, friction shoes and a wedge within the friction chamber, and springs within the spring chambers seated at their forward ends .against the front follower, and means connecting the friction shoes with the rear ends of-said spring, and adapted to compress said springs upon movement of the friction shoes.

11. In a railway draft rigging, the combination with the draw bar, draft sills, stop members and draft yoke, of a follower and a cushioning member, the cushioning member comprising a shell having a central friction chamber and spring chambers beside the friction chamber, friction shoesv and wedge within 'the friction chamber, and? springs within the spring chamber, supplemental friction ,shoes adapted to lcol-acl; bemental followeratone end and with :said-1 friction shoes,v an opening between each spring chamber and the friction chamber, asupplemental frictionA shoe passed through,

each of said openings and in frictional engagement with the rear inner portion of the shell, each of said supplemental friction shoes being in engagement vwith lsaid supplemental follower at one end .and with said springs at the other end.

16. In a railway draft ing member comprising a shell havmg a cen-j tral friction chamber and parallel ad]acen't spring chambers, a wedge and friction shoes within the spring chamber, and a supple-- .rgging,.a cushionfmental follower in engagement with said-'.2

friction shoes, an opening between each springchamber vand the friction chamber, a5,.- supplemental friction shoepassed through each of said openings and 1n frictional en* gagement ywith the rearinner portion ofthe shell, each. of lsaid supplementalfriction.

shoes'being in y'engagement with said supple? x aft..

s springs'at the other end, the said supplemental shoes being each of a semi-'lunar shape.

17. lln a draft gear, in combination, a friction chamber,spring chambers at the sides thereof, and'substantially longitudinally coextensive therewith, friction compression resisting members within the friction chamber, and springs within the spring chambers, and friction means operatively connecting the friction compression resisting members and the springs..

18. ln a draft gear, in combination a friction chamber, friction compression resisting members therein, spring at the sides of the friction chamber, and substantially longitudinally coeXtensive with the friction mechanism, and friction means operatively connecting the friction compression resisting members with the springs. i

19. ln a draft gear, a friction chamber, spring chambers adjacent thereto and substantially longitudinally coeXtensive therewith, friction compression resisting members within the friction chambers, and springs within the spring chambers and shoes connecting the friction compression resisting members with the springs. v u

20. ln a draft gear, a friction chamber, springs at the sides of said chamber, friction compression resisting members Within the friction -chamber, and friction means operatively connecting the friction 4compres-V sion resisting members to said springs, the

.said springs being disposed longitudinally of the friction chamber.`

cated exteriorly of said chamber, means-op.- l

eratively connecting the friction compres- -sion resistingmechanism with one'end of each of said springs, and means, movable longitudinally of the gear for pressing the other ends of said springs upon movement of the follower.

22. ln a shock absorbing mechanism, the combination with a follower, of a friction chamber, longitudinally movable friction shoes within said chamber, a wedge coperating with said shoes and in engagement with the follower, springs located outside of said chamber, means operatively connecting the friction shoes with one end of each of said-springs, and means, movable longitudinally of the gear for pressing the opposite ends of said springs upon movement of the follower.

28. ln a shock absorbing mechanism, the

intense said chamber, a spring located alongside the friction chamber on the exterior, thereof and substantially longitudinally coeXtensive with the friction mechanism, means oper-5 atively connecting the frictionD compression .resisting members with one end of said springand means for pressing the opposite -end of said spring simultaneously with the operation of the friction mechanism.

2 5. lln a shockl absorber, the combination with stop members, of a friction shell, a follower, friction elements within said shell, said elements including longitudinally movable friction shoes and a wedge coperating therewith, springs located eXteriorly of the shell, said springs being seated at their ends lagainst the follower, and means connecting the springs with the friction shoes adapted to compress the said springs against said follower.

26. ln a shock absorber, the combination with a plurality of springs and a friction device arranged side by side, and `means for ,simultaneously operating the friction device and compressing the springs from both ends thereof.

27. lin a shock absorbing mechanism, the combination with a follower, of a friction shell, friction shoes and a wedge mounted within said shell, the wedge being in en- Y gagement with the follower, springs 1n engagement with said follower, and means operatively connecting the friction shoes with the ends of said springs opposite to those ends which are in engagement with the follower.

28. lin a shock absorbing mechanism, the

combination with a friction shell having a plurality of friction shoes and a wedge mounted therein, of a follower, said follower being adapted to operate said wedge and thereby the friction shoes, springs arranged, parallelly with the friction shell and out of -alinement with the axis thereof, and means operatively connecting the friction shoes with said springs, said means including supplementall friction elements.

c Jenn r. ooo'nnon. ll/lVitnesses:v l i ELEANORL. NASH,

` Jonn- A.. Maa'rrnnns. 

